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After controlling a PRRS outbreak in a farm, can we produce own replacement animals in the same farm?

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After controlling a PRRS outbreak in a farm, can we produce own replacement animals in the same farm?

After controlling a PRRS outbreak in a farm, can we produce own replacement animals in the same farm?

Answered by: Young Lyoo I Published on: June 30, 2017

According to experimental data and also some field tests most pigs would have cleared the infection after 8 weeks, however, it cannot be 100 % excluded that very few pigs can harbor the virus for a longer time period.

Thus, if the outbreak has been controlled in the sense that there is no virus circulation in any sections (PCR negative and ELISA positive) and the female pigs were not pregnant at the time of the outbreak the use of these pigs as future breeding animals should be quite safe.

I would recommend, however, to put them in quarantine for 8-12 weeks and test them for antibody and virus at the end of the quarantine period -prior to the introduction into the sow herd-. It would be optimal also to test them prior to the quarantine period.

At the end of the quarantine period all pigs should be PCR negative, but its ok that they are antibody positive – providing that they were antibody positive also at the start of the quarantine.